患侧叩诊呈浊音（）
A.开放性气胸
B.闭合性气胸
C.张力性气胸
D.损伤性血胸
E.多根多处肋骨骨折
参考答案：D
果蔬糖制工艺中，可以用（）的氯化钙与0.2~0.3%上的亚硫酸氢钠混合液浸泡30~60min起到护色兼硬化的效果。
In recent years, the economy of our country____________ rapidly. [ ]
A. is increased
B. has increased
C. increased
D. has been increased
